The accident cut short the first practice by one hour but a second 90-minute session that was scheduled to start at 6:30 p.m. started 15 minutes early to give the teams some additional time.

“Thankfully none of the fans got injured, I hope,” Kligerman said. “It’s obviously a scary situation when the car gets that close to the fence.”

DIS has strengthened some areas of its fencing — areas where the fence can be removed to let fans and officials go to and from the track before and after races — after a crash last year resulted in more than 30 fans injured.